While sports are supposed to be respectable, sometimes athletes can cross the line. For professional competitors, it is of course no different. In the video above, boxer Vido Loncar can be seen suffering a loss in his pugilistic match. However, the fighting did quite not end there. Rather, Loncar began attacking the referee within the squared circle. The incident ultimately earned Loncar a lifetime ban from the Croatian Boxing Federation. Check out a replay of the incident within the video provided above. For more MMA news click here.